add filter to query on emails attribute

services/web/app/coffee/Features/User/UserGetter.coffee

@@ -37,7 +37,8 @@ module.exports = UserGetter =
 		if arguments.length == 2
 			callback = projection
 			projection = {}
-		db.users.findOne 'emails.email': email, projection, (error, user) =>
+		query = emails: { $exists: true }, 'emails.email': email
+		db.users.findOne query, projection, (error, user) =>
 			return callback(error, user) if error? or user?
 
 			# While multiple emails are being rolled out, check for the main email as

services/web/test/unit/coffee/User/UserGetterTests.coffee

@@ -60,9 +60,12 @@ describe "UserGetter", ->
 	describe "getUserByAnyEmail", ->
 		it "query user for any email", (done)->
 			email = 'hello@world.com'
+			expectedQuery =
+				emails: { $exists: true }
+				'emails.email': email
 			projection = emails: 1
 			@UserGetter.getUserByAnyEmail " #{email} ", projection, (error, user) =>
-				@findOne.calledWith('emails.email': email, projection).should.equal true
+				@findOne.calledWith(expectedQuery, projection).should.equal true
 				user.should.deep.equal @fakeUser
 				done()